another example

Author: jepler

circuitpython-esp32-camera/esp32-s3-eye-adafruitio/code.py

@@ -0,0 +1,79 @@
+# SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
+# SPDX-FileCopyrightText: Copyright (c) 2021 Jeff Epler for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+"""
+Upload a jpeg image to Adafruit IO at regular intervals
+
+This example requires:
+ * ESP32-S3-EYE development kit from Espressif
+
+To use:
+ * On io.adafruit.com, create a feed named "image" and turn OFF history
+ * On io.adafruit.com, create a dashboard and add an "image" block using the feed "image" as its data
+ * Set up CIRCUITPY/.env with WiFI and Adafruit IO credentials
+ * Copy the project bundle to CIRCUITPY
+"""
+
+import os
+import time
+
+import dotenv
+import io
+import sys
+import binascii
+import esp32_camera
+import board
+import socketpool
+import wifi
+import ssl
+
+import adafruit_minimqtt.adafruit_minimqtt as MQTT
+from adafruit_io.adafruit_io import IO_MQTT
+
+aio_username = dotenv.get_key('/.env', 'AIO_USERNAME')
+aio_key = dotenv.get_key('/.env', 'AIO_KEY')
+
+image_feed = "image"
+
+cam = esp32_camera.Camera(
+    data_pins=board.CAMERA_DATA,
+    external_clock_pin=board.CAMERA_XCLK,
+    pixel_clock_pin=board.CAMERA_PCLK,
+    vsync_pin=board.CAMERA_VSYNC,
+    href_pin=board.CAMERA_HREF,
+    pixel_format=esp32_camera.PixelFormat.JPEG,
+    frame_size=esp32_camera.FrameSize.SVGA,
+    i2c=board.I2C(),
+    external_clock_frequency=20_000_000,
+    grab_mode=esp32_camera.GrabMode.WHEN_EMPTY)
+cam.vflip = True
+
+
+pool = socketpool.SocketPool(wifi.radio)
+
+print("Connecting to Adafruit IO")                                              
+mqtt_client = MQTT.MQTT(                                                        
+    broker="io.adafruit.com",                                                   
+    username=aio_username,
+    password=aio_key,
+    socket_pool=pool,                                                           
+    ssl_context=ssl.create_default_context(),                                   
+)                                                                               
+mqtt_client.connect()                                                           
+io = IO_MQTT(mqtt_client)
+
+while True:
+    frame = cam.take(1)
+    if isinstance(frame, memoryview):
+        jpeg = frame
+        print(f"Captured {len(jpeg)} bytes of jpeg data")
+
+        # b2a_base64() appends a trailing newline, which IO does not like
+        encoded_data = binascii.b2a_base64(jpeg).strip()
+        print(f"Expanded to {len(encoded_data)} for IO upload")
+
+        io.publish("image", encoded_data)
+
+        time.sleep(10)